Abstract: A novel propellant resupply system for, and method of recharging the propellant tanks of, the attitude control system (ACS) of a spacecraft or the like are described, comprising first and second propellant conduits respectively interconnecting the outlets of the fuel and oxidizer pump inducers of the primary propulsion system with the fuel and oxidizer tanks for the ACS thruster engines, and controller valves within each propellant conduit for controllably diverting fuel and oxidizer under pressure from the fuel and oxidizer pumps to the thruster fuel and oxidizer tanks during operation of the primary propulsion system engines.

Abstract: A propellant acquisition device for a maneuvering engine in a satellite vehicle in which a propellant tank or container is provided with a propellant trap located internally of the tank adjacent a tank outlet to the maneuvering engine. The trap device is positioned to receive propellant and become refilled upon maneuvering engine use which causes propellant in the tank to migrate to the trap device and overcome the on-orbit drag on the propellant which causes it to migrate away from the trap device.